Approximation of functions on the Sobolev space on the sphere in the average case setting
Approximation of functions on the Sobolev space on the sphere in the average case setting
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平均情况设置下球体上 Sobolev 空间上的函数逼近
DOI:
10.1016/j.jco.2009.03.002
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发表时间:
2009-08
影响因子:
1.7
通讯作者:
Zhai, Xuebo
中科院分区:
文献类型:
--
作者:
Zhang, Yanwei;Wang, Heping;Zhai, Xuebo
In this paper, we discuss the best approximation of functions by spherical polynomials and the approximation by Fourier partial summation operators, Vallée–Poussin operators, Cesàro operators, and Abel operators, on the Sobolev space on the sphere with a Gaussian measure, and obtain the average error estimates. We also get the asymptotic values for the average Kolmogorov and linear widths of the Sobolev space on the sphere and show that, in the average case setting, the spherical polynomial subspaces are the asymptotically optimal subspaces in the Lq(1≤q<∞) metric, and Fourier partial summation operators and Vallée–Poussin operators are the asymptotically optimal linear operators and are (modulo a constant) as good as optimal nonlinear operators in the Lq(1≤q<∞) metric.
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DOI:
10.1007/978-3-642-69894-1
发表时间:
1985-01
期刊:
--
影响因子:
--
作者:
A. Pinkus
通讯作者:
A. Pinkus
影响因子:
1.7
作者:
G. Brown;F. Dai
通讯作者:
G. Brown;F. Dai
DOI:
--
发表时间:
1996
期刊:
--
影响因子:
--
作者:
G. Lorentz;M. Golitschek;Y. Makovoz
通讯作者:
G. Lorentz;M. Golitschek;Y. Makovoz
影响因子:
0.8
作者:
David Lee
通讯作者:
David Lee
DOI:
10.1146/annurev.cs.01.060186.001535
发表时间:
1988-08
期刊:
--
影响因子:
--
作者:
H. Woxniakowski
通讯作者:
H. Woxniakowski